Middle.Net Engineer

About the Position

We are seeking a Middle.NET Engineer to drive the technical modernization of a large-scale system from.NET Framework 4.8 to .NET 10. You will be responsible for migrating the backend stack, replacing Windows-only dependencies, refactoring legacy patterns, and ensuring every service is portable, containerizable, and ready for AWS cloud deployment. This role requires close collaboration with DevOps and database engineers as part of a cross-functional Agile team delivering a phased, production-safe migration.

Responsibilities

• Migrate a .NET Framework 4.8 application to.NET 10.
• Migrate a large database-first Entity Framework 6 model to EF Core 8 across multiple bounded contexts, one domain at a time.
• Identify and replace Windows-only libraries and assembly references that prevent building and running on Linux.
• Establish unit test coverage measurement and enforce quality gates as part of the migration pipeline.
• Collaborate with the DevOps engineer on Dockerfile authoring, environment configuration, and secrets injection.
• Participate in Agile/SCRUM processes, conduct code reviews, and document migration decisions.

Requirements

• 3+ years of C# and.NET backend development with strong knowledge of ASP.NET and ASP.NET Core.
• Proven, hands-on experience migrating.NET Framework applications to.NET Core /.NET 8, 10 in production.
• Solid experience with Entity Framework Core.
• Solid knowledge of DDD, CQRS, and repository patterns in layered.NET architectures.
• Familiarity with Docker multi-stage builds and Linux container fundamentals for.NET applications.
• Proficient with xUnit and Moq for unit testing; comfortable with container-wired test setups.
• Experience with AWS ECS / Fargate and ECR for deploying containerized.NET applications.
• Familiarity with MassTransit and RabbitMQ or Amazon MQ for event-driven messaging.
• Experience with Hangfire or similar background job processing frameworks.
• Proficient in Git and familiar with Agile/SCRUM team processes.

Nice to Have

• Experience building CI/CD pipelines for .NET projects.
• Familiarity with micro-frontend architecture and Angular-based single-page applications.
• Experience with automated code coverage tooling and enforcing coverage thresholds in CI.
• Experience with performance optimization and scalable enterprise backend systems.

We Offer

• Flexible working format - remote, office-based, or flexible.
• A competitive salary and good compensation package.
• Personalized career growth.
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more).
• Active tech communities with regular knowledge sharing.
• Education reimbursement.
• Memorable anniversary presents.
• Corporate events and team buildings.
• Other location-specific benefits.

About the Company

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